cnes activities on semantic search

Jérôme Gasperi

CNES activities on semantic search

CEOS WGISS-35INPE - Sao Paulo dos Campos, Brazil - May 7th, 2013

Semantic searchLinked Data

Faceted search

Semantic searchHelp users to find the right data

AMMA CYCLOPES GEOLAND

GLOBCOVER PARASOL POLDER

....

AMMA CYCLOPES GEOLAND

GLOBCOVER PARASOL POLDER

....

Land coverSoil moistureTemperatureReflectance Vegetation

...

How ?

Tag metadata at the product level with keywords related to the project or mission namee.g. search for "Land cover" products instead of "GLOBCOVER"

Use Exogeneous data to characterize product content.The product footprint should be use for automatic processing - e.g. toponyms extraction with OpenStreetMap

ExampleUsing Global Land Cover 2000 to automatically characterize product thematic content

Global Land Cover (GLC 2000)

Thematic sliders

SPOT cover - 1,300,000 scenes

Search for coastal cultivated area ?

Search results(footprints displayed in black over the map)

Coastal cultivated area

Thematic classificationis displayed within

the result metadata

costal...

...cultivated area

https://vimeo.com/51045597!

Linked dataAchieve multidisciplinary interoperability

« Linked data is the right way to do Semantic Web »Tim Berners-Lee

The Graph of Idea - www.griffsgraphs.com

Faceted searchBreak the hierarchy of search filters

Web search paradigms

Taxonomy search(e.g. Yahoo! Directory)

Direct search(e.g. google)vs.

Faceted search

Taxonomy search(e.g. Yahoo! Directory)

Direct search(e.g. google)+

(a sort of)

« Faceted search enables users to navigate a multi-dimensional information space by combining text search with a progressive narrowing of choices in each dimension »

http://en.wikipedia.org/wiki/Faceted_search

Classification to be ordered in multiple ways